正确答案: C

anonymous

题目：用户使用匿名FTP连接远程主机，而无须成为其注册用户。下列()是匿名FTP的用户标识符。

解析：C

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举一反三的答案和解析：

[单选题]●不属于会话连接和传输连接之间的关系的是 (20) 。(20)

多对多

解析：【解析】会话连接要通过传输连接来实现。会话连接和传输连接有三种对应关系：一个会话连接对应一个传输连接；多个会话连接建立在一个传输连接上；一个会话连接对应多个传输连接。

[单选题]一个组织的灾难恢复(DR，disasterrecovery)策略的变更时将公司的关键任务应用的恢复点目标(RPO)被缩短了，下述哪个是该变更的最显著风险?

备份没有以足够的频率进行以实现新的RPO

解析：答案：C

[多选题]●At a basic level, cloud computing is simply a means of delivering IT resources as (71).Almost all IT resources can be delivered as a cloud service: applications, compute power, storage capacity, networking,programming tools,even communication services and collaboration (72)。Cloud computing began as large-scale Internet service providers such as Google,Amazon,and others built out their infrastructure. An architecture emerged: massively scaled, (73) distributed system resources,abstracted as virtual IT services and managed as continuously configured, pooled resources. In this architecture, the data is mostly resident on (74)“somewhere on the Intemet”and the application runs on both the "cloud servers”and the user's browser.

computers

services

software

disks

machines

tools

vertically

inclined

decreasingly

middleware

servers

hard disks

individual

general

separate

解析：C,D,A,C,B

[单选题]AES算法支持几种密钥长度?()

3

[单选题]下列哪个不是常见扫描技术()。

ping扫描

[单选题]在IEEE802.11标准中，实现虚拟监听机制的层次是

MAC层

解析：IEEE802.11的MAC层采用一种虚拟监听(VirtualCarrierSense，VCS)机制，用于进一步减少发生冲突的概率。故选择C选项。

[单选题]在______中可以对弹出窗口阻止程序进行设置。

在Internet选项“隐私”选项卡的“弹出窗口阻止程序”

解析：答案：C